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virtio_pci: Introduce device parts access commands 

Introduce device parts access commands via the admin queue.

These commands and their structure adhere to the Virtio 1.4
specification.

Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Link: https://lore.kernel.org/r/20241113115200.209269-2-yishaih@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Yishai Hadas 2024-11-13 13:51:54 +02:00 committed by Alex Williamson
parent a13bf78fee
commit 7c1ae151e8
1 changed files with 131 additions and 0 deletions
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131
include/uapi/linux/virtio_pci.h
View File

@ -40,6 +40,7 @@
#define _LINUX_VIRTIO_PCI_H
#include <linux/types.h>
#include <linux/kernel.h>
#ifndef VIRTIO_PCI_NO_LEGACY
@ -240,6 +241,17 @@ struct virtio_pci_cfg_cap {
#define VIRTIO_ADMIN_CMD_LEGACY_DEV_CFG_READ 0x5
#define VIRTIO_ADMIN_CMD_LEGACY_NOTIFY_INFO 0x6
/* Device parts access commands. */
#define VIRTIO_ADMIN_CMD_CAP_ID_LIST_QUERY 0x7
#define VIRTIO_ADMIN_CMD_DEVICE_CAP_GET 0x8
#define VIRTIO_ADMIN_CMD_DRIVER_CAP_SET 0x9
#define VIRTIO_ADMIN_CMD_RESOURCE_OBJ_CREATE 0xa
#define VIRTIO_ADMIN_CMD_RESOURCE_OBJ_DESTROY 0xd
#define VIRTIO_ADMIN_CMD_DEV_PARTS_METADATA_GET 0xe
#define VIRTIO_ADMIN_CMD_DEV_PARTS_GET 0xf
#define VIRTIO_ADMIN_CMD_DEV_PARTS_SET 0x10
#define VIRTIO_ADMIN_CMD_DEV_MODE_SET 0x11
struct virtio_admin_cmd_hdr {
__le16 opcode;
/*
@ -286,4 +298,123 @@ struct virtio_admin_cmd_notify_info_result {
struct virtio_admin_cmd_notify_info_data entries[VIRTIO_ADMIN_CMD_MAX_NOTIFY_INFO];
};
#define VIRTIO_DEV_PARTS_CAP 0x0000
struct virtio_dev_parts_cap {
__u8 get_parts_resource_objects_limit;
__u8 set_parts_resource_objects_limit;
};
#define MAX_CAP_ID __KERNEL_DIV_ROUND_UP(VIRTIO_DEV_PARTS_CAP + 1, 64)
struct virtio_admin_cmd_query_cap_id_result {
__le64 supported_caps[MAX_CAP_ID];
};
struct virtio_admin_cmd_cap_get_data {
__le16 id;
__u8 reserved[6];
};
struct virtio_admin_cmd_cap_set_data {
__le16 id;
__u8 reserved[6];
__u8 cap_specific_data[];
};
struct virtio_admin_cmd_resource_obj_cmd_hdr {
__le16 type;
__u8 reserved[2];
__le32 id; /* Indicates unique resource object id per resource object type */
};
struct virtio_admin_cmd_resource_obj_create_data {
struct virtio_admin_cmd_resource_obj_cmd_hdr hdr;
__le64 flags;
__u8 resource_obj_specific_data[];
};
#define VIRTIO_RESOURCE_OBJ_DEV_PARTS 0
#define VIRTIO_RESOURCE_OBJ_DEV_PARTS_TYPE_GET 0
#define VIRTIO_RESOURCE_OBJ_DEV_PARTS_TYPE_SET 1
struct virtio_resource_obj_dev_parts {
__u8 type;
__u8 reserved[7];
};
#define VIRTIO_ADMIN_CMD_DEV_PARTS_METADATA_TYPE_SIZE 0
#define VIRTIO_ADMIN_CMD_DEV_PARTS_METADATA_TYPE_COUNT 1
#define VIRTIO_ADMIN_CMD_DEV_PARTS_METADATA_TYPE_LIST 2
struct virtio_admin_cmd_dev_parts_metadata_data {
struct virtio_admin_cmd_resource_obj_cmd_hdr hdr;
__u8 type;
__u8 reserved[7];
};
#define VIRTIO_DEV_PART_F_OPTIONAL 0
struct virtio_dev_part_hdr {
__le16 part_type;
__u8 flags;
__u8 reserved;
union {
struct {
__le32 offset;
__le32 reserved;
} pci_common_cfg;
struct {
__le16 index;
__u8 reserved[6];
} vq_index;
} selector;
__le32 length;
};
struct virtio_dev_part {
struct virtio_dev_part_hdr hdr;
__u8 value[];
};
struct virtio_admin_cmd_dev_parts_metadata_result {
union {
struct {
__le32 size;
__le32 reserved;
} parts_size;
struct {
__le32 count;
__le32 reserved;
} hdr_list_count;
struct {
__le32 count;
__le32 reserved;
struct virtio_dev_part_hdr hdrs[];
} hdr_list;
};
};
#define VIRTIO_ADMIN_CMD_DEV_PARTS_GET_TYPE_SELECTED 0
#define VIRTIO_ADMIN_CMD_DEV_PARTS_GET_TYPE_ALL 1
struct virtio_admin_cmd_dev_parts_get_data {
struct virtio_admin_cmd_resource_obj_cmd_hdr hdr;
__u8 type;
__u8 reserved[7];
struct virtio_dev_part_hdr hdr_list[];
};
struct virtio_admin_cmd_dev_parts_set_data {
struct virtio_admin_cmd_resource_obj_cmd_hdr hdr;
struct virtio_dev_part parts[];
};
#define VIRTIO_ADMIN_CMD_DEV_MODE_F_STOPPED 0
struct virtio_admin_cmd_dev_mode_set_data {
__u8 flags;
};
#endif